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AHgh+RpV0T9rTh8xgVHhd+Ya5w8LlCI2W3gWF8xlp9BivUW9dblOwlZsV/Fekf/BsKM+E/jgzhxMVXgR57GLSwM=@vger.kernel.org X-Gm-Message-State: AFuF++m9cRiev+69zp9RqN5V2hsn6Ir5zX946rr1Keran6i25wmAPm3K WFyfA06R1qceP8iti9KVub6i6ooztY3vCb0mGroZ8tU779MO3OBdwquDbBYVVVgHmvjSxTi8hSv GvurERJ4vpKl6biRteuTY2A9N6CyFqaHg+C2y3LsMotxC5Hb9ZGTr9xLsZjo= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4fea:b0:4b3:7b31:8df0 with SMTP id 5614622812f47-4b3981ae41amr18296040b6e.10.1788066507419; Sat, 29 Aug 2026 22:08:27 -0700 (PDT) Date: Sat, 29 Aug 2026 22:08:27 -0700 In-Reply-To: <6a778d36.01d0871a.3a0d52.006f.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a93bacb.08e933ee.dbf97.00f9.GAE@google.com> Subject: Re: [syzbot] [block?] WARNING in blk_validate_limits From: syzbot To: axboe@kernel.dk, hch@infradead.org, kbusch@kernel.org, kbusch@meta.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: e30626823a40 Add linux-next specific files for 20260828 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=157e7d79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=da8932b2925a9804 dashboard link: https://syzkaller.appspot.com/bug?extid=ac00e7bf7ac8c91af921 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16936e25580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=179fc379580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f3d0d809c004/disk-e3062682.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/14efbbb42757/vmlinux-e3062682.xz kernel image: https://storage.googleapis.com/syzbot-assets/0919b1002ace/bzImage-e3062682.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/4f0c60a63a72/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=12936e25580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ac00e7bf7ac8c91af921@syzkaller.appspotmail.com F2FS-fs (loop0): f2fs_disable_checkpoint finishes, err:0 F2FS-fs (loop0): Mounted with checkpoint version = 48b305e6 fscrypt: AES-256-XTS using blk-crypto-fallback ------------[ cut here ]------------ lim->dma_alignment > PAGE_SIZE WARNING: block/blk-settings.c:497 at blk_validate_limits+0x1676/0x2270 block/blk-settings.c:497, CPU#1: syz-executor215/5627 Modules linked in: CPU: 1 UID: 0 PID: 5627 Comm: syz-executor215 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:blk_validate_limits+0x1676/0x2270 block/blk-settings.c:497 Code: e8 cf da 0b fd 90 0f 0b 90 eb 8f e8 c4 da 0b fd 90 0f 0b 90 eb 84 e8 b9 da 0b fd 90 0f 0b 90 e9 76 ff ff ff e8 ab da 0b fd 90 <0f> 0b 90 e9 68 ff ff ff e8 9d da 0b fd 90 0f 0b 90 e9 81 00 00 00 RSP: 0018:ffffc900038dee60 EFLAGS: 00010293 RAX: ffffffff84bbe625 RBX: ffffc900038df0f0 RCX: ffff888076f99f40 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000001000 RBP: 00000000ffffffff R08: ffff88806ec9427f R09: 1ffff1100dd9284f R10: dffffc0000000000 R11: ffffed100dd92850 R12: ffffc900038df040 R13: dffffc0000000000 R14: 1ffff9200071be1e R15: dffffc0000000000 FS: 000055557ce9e400(0000) GS:ffff888124dd6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000072708000 CR4: 00000000003526f0 Call Trace: queue_limits_commit_update+0x87/0x390 block/blk-settings.c:552 loop_configure+0x7f1/0xdc0 drivers/block/loop.c:1086 lo_ioctl+0xae0/0x2010 drivers/block/loop.c:1564 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:798 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1351d03669 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd20598c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1351d03669 RDX: 00002000000005c0 RSI: 0000000000004c0a RDI: 0000000000000004 RBP: 0000000000000001 R08: 000055557ce9f580 R09: 000055557ce9f580 R10: 0000200000000600 R11: 0000000000000246 R12: 00007ffd20598c60 R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007f1351d6204b --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.